心脏的血液供应来自冠状动脉。心肌供血不全的主要原因是冠状动脉粥样硬比,大约占心肌供血不全各种原因的90％以上。但尚有少数心肌缺血系由于其他病因造成,包括所谓冠状动脉造影正常的心肌缺血以及原因不明的心肌缺血。它们不但能造成慢性心肌供血不全、心肌硬化,亦能引起急性心肌梗塞;虽然临床上并不多见,但对鉴别心肌缺血的病因,认识原 The heart’s blood supply comes from the coronary arteries. The main reason for myocardial insufficiency is coronary atherosclerosis, accounting for about 90% of all causes of myocardial insufficiency. However, a small number of myocardial ischemia is due to other causes, including the so-called normal myocardial ischemia of coronary angiography and unexplained myocardial ischemia. They not only cause chronic myocardial insufficiency, myocardial sclerosis, can also cause acute myocardial infarction; although clinically rare, but to identify the cause of myocardial ischemia, understanding of the original